I have to set balance of main PC sound to total right and increase volume to only hear sound-B (original).

But same program with different TV-card (not pinnacle, but FlyTV) only shows "mono" (= main sound), Dual A (= sound A local) and Dual B (= sound B original), but neither "stereo" nor "Dual A + Dual B"; there I can set "Dual B" to hear original language.